A Virtual Timer

• Question: Write a “virtual timer” which counts and displays the time in the format “HH:MM:SS’mm””

#include <iostream>
#include <iomanip>
#define DELAY 3000

using namespace std;

int main()
{
    int hour, minute, second, millisecond;
    hour = minute = second = millisecond = 0;

    for(;;)
    {
        cout << setw(2) << setfill('0') << hour << ":";
        cout << setw(2) << setfill('0') << minute << ":";
        cout << setw(2) << setfill('0') << second << "\'";
        cout << setw(2) << setfill('0') << millisecond++;
        cout.flush();

        for(int i = 0; i < DELAY; i++)
            cout << '\b';

        if(millisecond == 100)
        {
            millisecond = 0;
            second++;
        }

        if(second == 60)
        {
            second = 0;
            minute++;
        }

        if(minute == 60)
        {
            minute = 0;
            hour++;
        }
    }
    system("PAUSE");
    return EXIT_SUCCESS;
}